What does the prefix fore- mean?
Fore- comes from Old English and means "in front" or "before". It shows a front position, either in space or in time. It is an old English prefix, so it shows up in everyday words, not only in science.

Prefix · before / in front
Signals a front position or anticipation of something: forecast, forearm, forehead, foresee.
Written by Bryan López, English teacher · Updated
Fore- comes from Old English and means "in front" or "before". It shows a front position, either in space or in time. It is an old English prefix, so it shows up in everyday words, not only in science.
The most important use of fore- is getting ahead of something: knowing, saying or warning "before" it happens. That is why you see it in words about forecasts, vision of the future and warnings. If you see fore- with a verb, think: "doing it earlier". If you see it with a body part, think: "the one in front".
Attaches to verbs and nouns. Do not confuse with "for-" (no final "e"), which is a different prefix:
Pronunciation: /fɔːr/, rhymes with "door." Do not confuse with "for-" (forget, forgive, forbid), which is a different Germanic prefix signalling prohibition or loss.
fore-/fɔːr/
Tap the button to hear how the prefix sounds. Each word in the table has its own audio.
The American standard is /ˈfɔːrhed/ (two clear syllables). Traditional British pronunciation is /ˈfɒrɪd/ (almost like "forrid"). Both are correct depending on the variety.
"Weather forecast" is the most common collocation, but "forecast" applies to any quantitative prediction: sales forecast, economic forecast, demand forecast, budget forecast.
A trick to remember it
Picture a ship's bow, the front part: fore- = in front, ahead. forecast (cast ahead in time), forearm.
Exercise 1 · Form the word
Exercise 2 · Pick the right one
"Nobody could have ___ the dramatic events that completely changed the outcome of the election."
Exercise 3 · Pick the right one
What is the difference between "forecast" and "foreshadow"?
The prefix fore- signals a front position or anticipation of something: forecast, forearm, forehead, foresee.
The prefix fore- is pronounced /fɔːr/. For example, "forecast".
"cast" becomes "forecast". It is a typical example of the fore- prefix.
un-, re-, pre-, dis-, over-, in-... every beginning you need to unlock thousands of English words at once.